Triturating machine



March 15,1927. 1,620,639

A. F. FlLEs TRITURATING MACHINE Filed Nov. 12. 1926 2 Sheets-Sheet 1 I glvwmtoz 1 5' a dww flaw.

March 15,1921 m 1,620,639

A. F FILES TRITURATI NG MACHI NE Filed NOV. 12. 1926 2 Sheets-Sheet 2 Patented Mar. 15, 1927.

ADINO F. FILES, OF MA'UMEE, OHIO.

TBITURATING- MACHINE.

Application filed November 12, 1926. Serial No. 147,864.

My invention has for its object to proride, a machine for readily and efficiently triturating powders in large quantities The invention provides means for constantly rubbing and mixing the powders together by the use of heavy weighted bodies.

The invention may be contained in ma chines of difierent forms, and to illustrate a practical application of the invention 1 have selected .a construction containing the invent-ion as an example of such structures and shall describe ithereinafter. The machine, for purpose of illustration, is shown in the accompanying drawings.

Fig; 1 is a side View of the machine Fig. 2 is an end view of the machine. Fig. 3 is a view of asection taken on the plane of the line 3-3 indicated in Fig. l. l is a view of a section taken on the plane of the line kl indicated: in 3. Fig. 5 illustrates the action of the rollers that are shown in Figs. 3 and a in their triturat ing and mixing operation.

In the form of machine shown in the drawings, a pair of heavy rollers are located in position in a drum so as to be guided by the ends of the drum as the drum is rotated and at the same time cause the powdered materials that may be placed in the drum to be thoroughly mixed. The rolling of the rollers, with respect to the drum and with respect to each other, produces the trituration of the powders. The drum 1 is rotatably supported in a frame, or standard, 2. It is driven by means of an electric motor 3 which operates through suitable reducing gear wheels l, to cause the rotation of the drum. The drum has a suitable top, or cover, 5, that may be secured in position by bars 6 and so as to cover or close an opening 7 that is formed in one side of the drum. A pair of heavy steel rollers 10 are located in the drum. They are provided with hubs 11 that extend into slots 12, that are formed in the ends 13 of the drum. The rollers 10 have corrugated surfaces 14. The corrugr ti one are small and extend around the roller in each case, moreover. the corrugations are prominent and are so located on the rollers that the ridges of one roller will fit into the valleys or channels of the other roller as shown in Fig. 4. The channels 12 have a width that is considerably larger than the diameters of the hubs 11 so as to permit a considerable play as between the interior surface of the drum and the rollers.

In the operation of the machine about 160 pounds to 200 pounds of the powder is placed in the machine and the motor is started which causes the drum to rotate. The rollers weigh from 150 pounds to 180 pounds and, consequently, the rounded corrugations of the rollers ride onto the powder located at the bottom of the'drum with a considerable pressure, also owing to this weight they press one against the other with a considerable force. The resultant effect is that the drum can be turned at a considerable speed, relatively speaking, while the rollers will maintain their positions in the lower part of the machine owing to their weight, notwithstanding the fact that the powder is being carried upwards on one side of the drum as it is rotated The rollers, in other words, will roll through the powder notwithstanding its large mass. In this movement through the powdered material, the outermost points of each of the rollers tract on the surface of that portion of the powder that may be located between the rollers and the surface of the drum. Inasmuch as it requires the transmission of considerable power to thus carry the rollers upward and to cause their rotation, the traction required or produced causes a rubbing action of the particles of the powder. Also, since the outermost points of the rollers are moving in the same direction as the surface of the drum with a decreased speed, the rubbing action against the powder is correspondingly increased. Also, since each roller moves in the same direction that the interior surface of the drum is moved, the juxtaposed parts of the two rollers move in opposite directions and since the powderis pressed between the rollers by the weight of the upper roller and the pressure of the powder against the lower roller, which is being carried upward in the rotation of the drum, thepowder that is forced between the rollers is not only pressed with the pressure of the upper roller. but also is rubbed in opposite directions and on opposite sides by the two rollers. Also by reason of the rotation of the rollers the powder is constantly mixed and carried over to portions of the powder that have been previously operated upon by the rollers. Furthermore, as the powder is carried towards the upper side of the drum it falls from the upper side of the drum, thus causing a constant mixing not only of the ingredients of the powder,

but also a constant mixing as between the portions of the powder that have been triturated and the portions of the powder that have not been triturated. As the drum continues to rotate the powder is thus continuously turned over and mixed and triturated by the rollers acting on each other and by the rollers acting on the surface of the drum These general operations are in dicated in the conventional way in Fig. The width of the channels 12 being about 20 per cent larger than the diameter of the hubs 11 of the rollers permits a small portion of the powder to be carried beneath the rollers on the inside surface of the drum and be triturated by the force that is transmitted. from the rotating drum to the rollers to cause the rollers LO move through the powder that is also being carried upwards by the drum, with the result that the rate of movement of the powder on the surface of the drum is slightly greater than the rate of movement of the portions of the rollers in proximity to the surface of the drum and separated therefrom by portions of the powder. The speed of the drum is preferably such as to keep the rollers a little below the horizontal line through the axis of the drum. If, however, the rollers are carried over the axis of the drum, which occurs some times when the powder is first inserted in the drum and because it is piled in one place below the cover, they will drop in position at the bottom of the drum, distributing the powder over the surface of the drum, often in a single revolution of the drum, when the process described above will continue until all of the powder has been thoroughly triturated.

I claim:

1. In a triturating machine a pair of unconnected rollers, a drum, each end of the drum having a slot in its peripheral.portions, the rollers having hubs that extend into the slots for guiding the rollers and means for rotating the drum.

2. In a triturating machine, a pair of rollers, a drum, each end of the drum having a slot in its peripheral portions, the rollers having hubs that extend into the slots for guiding the rollers and means for rotating the drum.

3. In a triturating machine, a drum, each end of the drum having a slot in its peripheral portion, a pair of rollers resting on the interior surface of the drum and having hubs at their ends extending into the slots for guiding the rollers the diameter of the hubs being over ten percent smaller than the width of the slots in which they are located and mean for rotating the drum.

In witness whereof I have hereunto signed my name to this specification.

ADINO F. FILES. 

